Surface quality requirements for aluminum alloy doors and windows

03-03-2023

1. The surface of doors and windows shall be free of obvious scratches, scratches, bumps and other defects.

2. There shall be no obvious color difference on the colored surface of adjacent bars of doors and windows.

3. The surface of doors and windows shall be free of aluminum chips, burrs, oil spots or other stains, and the assembly joints shall be free of overflowing adhesive.

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